Omron G3PW, User Manual

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Control Methods Section 4-1
4-1 Control Methods
Any of the following methods can be used as the output mode for the G3PW
Power Controller: Phase control, optimum cycle control, or ON/OFF control. In
addition, it is possible to switch between phase control and optimum cycle
control during operation.
Phase Control
With phase control, the phase-angle range for the AC voltage supplied to the
load is changed by the switching element to continually change the power
supplied to the load.
Phase control is suitable for precise temperature control or for controlling
heaters with large inrush currents.
Optimum Cycle
Control
With optimum cycle control, the output is turned ON and OFF with each AC
half cycle. The output is switched at the voltage zero-cross point, enabling
high-precision temperature control while suppressing noise.
ON/OFF Control
With ON/OFF control, the control output is switched ON and OFF based on
the ON/OFF voltage signal from the temperature controller. The output phase
angle is set using operation keys or an external variable resistor.
ON OFF
Output OFF Output ON Output OFF Output ON